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4th May 2010 According to NTA Monitor's 2010 Annual Security Report, the average number of Internet security vulnerabilities afflicting organisations has fallen.. Read More

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1st October 2009 All penetration testers will remember the long tail of Windows NT 4.0, and how this operating system continued to be used long past the point when security updates stopped at the end of 2004. For many years the presence of an unpatchable NT4 server was a common issue in a penetration test report, and it is only now, almost five years after security support ended, that finding an NT4 system on a network is becoming a rare event. Read More

One in four web applications susceptible to high risk security flaws

7th September 2009 NTA Monitor has reported a 10% increase in the total number of web applications found to have at least one high-risk security issue... Read More

Organisations facing a changing threat landscape

20th July 2009 According to NTA Monitor's 2009 Annual Security Report, the average number of Internet security vulnerabilities is on the rise... Read More
Date: 1st October 2007
Risk: Medium

Vulnerabilities recently found in Yahoo! Messenger can be exploited by malicious people to compromise a user's system. The vulnerabilities are caused due to boundary errors within the YVerInfo.GetInfo.1 and YVerInfo.GetInfo2.1 ActiveX controls (YVerInfo.dll) when handling the "fvCom()" and "info()" methods. These can be exploited to cause stack-based buffer overflows by passing specially crafted, overly long arguments to the affected methods.

Successful exploitation can result in arbitrary code execution, but to be successful, a malicious web page must be in a domain that contains a ".yahoo." substring in the subdomain of the TLD. The vulnerabilities have been confirmed in versions downloaded before the end of August this year and can be patched by downloading the update to version 8.1.0.419 at:

http://messenger.yahoo.com/download.php.

References